If I buy an item from ebay but the item arrived after the item is refunded (because it took more than 3 months to arrive). Should I re pay?

The most honest approach is to email the seller and say you received the item, then see if they ask you to return it or keep it.

If you still want the item , yes.

If you no longer require it, then you should ask the sender if they wish to pay for return,

It would be the honorable thing to do.

I would